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Hot backup synchronizing method supporting fault tolerance

A technology of hot standby and synchronous signals, which is applied in the direction of synchronous devices, error prevention, digital transmission systems, etc., can solve the problems of low error detection ability, achieve the effects of improving availability, improving immunity, and enhancing reliability

Active Publication Date: 2011-09-28
NANJING NRIET IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a fault-tolerant hot backup synchronization method for the problem of low error detection capability in the existing hot backup synchronization method, which can detect errors generated by irrelevant master and backup signal sources, and detect errors in a single It can continue to work after an error occurs, with good fault tolerance and availability, and the irrelevant hot standby synchronization signal generation device brings higher reliability and maintainability

Method used

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with embodiment.

[0021] A fault-tolerant hot standby synchronization method includes selecting irrelevant hot standby synchronization signal generating equipment, adopting a one-way synchronization signal channel and enabling the synchronized equipment to have error detection and switching functions.

[0022] The irrelevant hot standby sync signal generator includes the following:

[0023] (1) The main and standby two synchronous signal generating devices are physically separated, and it is recommended that the power supply and grounding should also be isolated;

[0024] (2) The synchronization time intervals of the synchronization signals sent by the master and backup synchronization signal generators are the same, and the error precision is the same;

[0025] (3) The maximum value of the phase difference range between the synchronization signals sent by the main and backup synchronization signal g...

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PUM

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Abstract

The invention discloses a hot backup synchronizing method supporting fault tolerance. The method is characterized by comprising the following steps: selecting an irrelevant hot backup synchronizing signal generating device, wherein main and standby synchronizing signal passages are physically separated; adopting a one-way synchronizing signal passage and making a signal passage between the synchronizing signal generating device and a synchronized device unidirectional from the generating device to the synchronized device, namely the synchronizing signal generating device is only provided withan output port of the passage and the synchronized device is only provided with an input port of the passage; and detecting errors and switching the synchronized device, so that the synchronized device is supported by a local clock, wherein the accuracy of the local clock is higher than that of a synchronizing signal error. The method has the advantages of enhancing the reliability of the system,improving the maintainability and immune competence of the system and enhancing the operability.

Description

technical field [0001] The present invention relates to an automatic control method, especially a multi-equipment synchronous control technology, in particular to a mechanism commonly used in rail transit equipment to achieve a synchronous source signal by adding a voting mechanism for irrelevant hot standby synchronous signals. A fault-tolerant hot standby synchronization method for fault-tolerant purposes. Background technique [0002] As we all know, in the field of automatic control, some systems require multiple devices to work synchronously, and have high reliability and maintainability requirements for the synchronization mechanism. Therefore, a variety of synchronization mechanisms have been developed: single signal source synchronization, phase-locked transmission signal synchronization step by step, mutual phase-locked hot standby synchronization signal sources, etc. However, the requirements for the control system involving personal safety are more stringent. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L1/22H04L29/06H04L7/00
Inventor 束元蔡李峰朱骞
Owner NANJING NRIET IND CORP